How to keep alignment shims from falling out?

[Justins76]

What is the best way to keep the bolts that hold the alignment shims on the front end to stay put? They used to keep backing off and allowing the shims to fall out. The last alignment shop replaced the nuts with the locking nylon nuts, but those keep backing off too. Ok to use locktite? Also, what torque should the nuts be. 50ft-lbs doesnt seem to hold them

[79BIG10]

Here's the info I copied from 73-87.com and I used when I rebuilt my front end. No problems I've had

Control Arm Installation:

Start by installing the lower control arms first. If you notice, the cross shaft has aligning holes which aligns with studs inside the control arm mounting saddles. Install both u-bolts and while tightening make sure you get the holes aligned with the studs. Torque all four u-bolt nuts to 85 ft.lbs.

For the upper control arm, untape your shims and set them back on the control arm mounting studs in the correct order. Now slide your control arm onto the studs. If you followed the instructions above the cross shaft should have the side with the holes sunk in toward the frame. Torque the nuts to 70 ft.lbs.

Take the time to clean up your sway bar and remove the old bushings. Grease the new bushings and install them on the bar. You need to put the split side toward the engine for the two middle bushings. The ones going on the sway bar ends need to have the split toward the wheel. Push the clamps on the bushings and mount it to the frame brackets. Torque the bolts to 25 ft.lbs. Raise the bar up and onto the lower control arm. After you get all four bolts and nuts started, torque to 25 ft.lbs.